Recopilación, estandarización de análisis convencionales y especiales de núcleos a fin de generar los tipos de roca de los diferentes campos del Bloque 15

Abstract

The classification of the reservoir into different rock types, and the application of hydraulic flow units is a key step for understanding the reservoir description. Furthermore, for providing strong petrophysics input data in a reservoir simulation model. Several methods have been applied in the classification of rock types. Winland’s and Amaefule’s methods are considered very useful in clastic reservoirs. These methods were applied on Napo-U and Napo-T reservoirs in Block 15, located in the Ecuadorian basin, using available core data. The main objectives were to develop correlations between porosity and permeability for each rock type, and multilinear regression models to predict artificial rock types based on well logs, these in zones without core data. Once rock types were defined, capillary pressure and relative permeability curves were grouped, normalized, averaged and de-normalized to represent a set of curves for each rock type. Correlations were tested by comparing core permeability with calculated permeability. Results present strong correlation between measured and calculated parameters. Multilinear regression models were tested in wells without core data, and results present a normal distribution between porosity and rock type.